JPS6323356Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-temperature sodium container used, for example, in a sodium-cooled fast breeder reactor.

The heat retention equipment required for this type of container also requires the installation of a preheater, so the installation structure is quite complex and costs are high.

FIGS. 1 and 2 show an outline of a conventional container of this type. Heater fixing fittings 2 are fixed to the container 1 at predetermined intervals, and are attached to the outer circumferential surface of the container 1 by the fittings 2. A preheater 3 is supported through it.
Furthermore, bolts 5 for supporting and fixing the insulating material 4 are installed in the metal fitting 2, and ribs 6 are attached to the container 1 side at appropriate intervals to support the weight of the insulating material 4.

As the heat insulating material, a so-called package type heat insulating material in which the outer periphery of the heat insulating material 4 is can-molded with a steel plate, as shown in FIG. 3, is often used because of its ease of attachment and detachment. This package type heat insulating material 4 is stacked in a block shape on the ribs 6 so that a thin stay sheet 7 installed for the purpose of preventing heat leak path is interposed between the heat insulating material 4 and the container 1. 4 and is supported and fixed to the container 1 side with nuts and washers 8.
Further, in order to ensure secure attachment, the package-type heat insulators 4 are connected to each other by connectors 9.
Furthermore, since a gap corresponding to the width of the heater fixing fitting 2 inevitably occurs between the container 1 and the heat insulating material 4,
For the purpose of preventing convection when preheating the container 1,
Convection prevention plates 10 are arranged at appropriate intervals.

Regarding the conventional high temperature sodium container,
The package-type heat insulating material 4 used to keep the container warm becomes heavy due to stay scanning and other processing, and its supporting structure inevitably requires a large-scale structure such as the ribs 6. In addition, due to the heat insulation construction, some clearance is created between the package type heat insulation materials 4, so that heat leaks are likely to occur. Furthermore, since the canning of the heat insulating material 4 and the large-scale support structure also contribute as a heat radiation path, the amount of heat dissipated is larger than that of a general heat insulating material. Furthermore, the gap created between the container 1 and the heat insulating material 4 by the heater fixture 2 requires the installation of a convection prevention plate 10, which increases the amount of attached hardware.

As described above, the conventional high-temperature sodium container requires a large-scale heat-insulating equipment including the support structure, and at the same time, the capacity of the air conditioning equipment increases due to the amount of heat dissipated, making it extremely uneconomical. It was hot.

Furthermore, in sodium-cooled fast breeder reactors, the radiation level inside the reactor is high and the room is usually placed in a nitrogen gas atmosphere, so there is generally no entry into the room after the plant has started operation; Equipment is required to be completely maintenance-free throughout its life. Therefore, there was no need to remove and reinstall the reactor heat insulation equipment after it had been installed before use, and there was no need to constantly use package-type heat insulation materials.

The present invention was proposed in view of these circumstances, and includes a plurality of support bolts that are erected at intervals on the outer circumferential surface of the container and are fixed through the heat insulating material layered on the outer circumferential surface of the container. A heater laid along the outer circumferential surface of the container and a support plate arranged at intervals along the outer circumferential surface of the container and to which a sodium leak detector in the container is attached are supported by the support bolts. The objective is to create an improved high-temperature sodium container that is low in cost, suppresses heat radiation, and has a simplified mounting structure for heat-insulating equipment. It is in the point of providing.

In the present invention, as described above, a plurality of support bolts erected at intervals on the outer circumferential surface of the container are fixed through the heat insulating material layered on the outer circumferential surface of the container, thereby supporting and holding the bolts of the heat insulating material. Since this method is adopted, the heat insulating material can be installed easily and inexpensively.

Furthermore, in the present invention, the support bolt for attaching the heat insulating material is used, and a heater is installed on the support bolt along the outer circumferential surface of the container, and a heater is disposed along the outer circumferential surface of the container at a distance from each other, In addition, since the support plate to which the in-container sodium leakage detector is attached is supported, the bolts are also used as various accessory metal parts and heater mounting members necessary for the high-temperature sodium container, and the structure is improved. This greatly simplifies the process, resulting in significant cost savings. In addition, compared to the conventional structure, the various attached metal parts,
Since the heater and the like are attached by point contact using support bolts, the hoop-clamping effect of the support ribs on the container is eliminated, improving the reliability and safety of the container.

In addition, as mentioned above, the support plates, which are supported by support bolts and are spaced apart from each other along the outer circumferential surface of the container, support the sodium leak detector inside the container, support the weight of the heat insulating material, and support the container. It also serves to prevent convection along the wall surface, and the detector supported on the support plate can reliably detect even a minute leak of sodium inside the container at an early stage, increasing the safety of the container. The invention has many advantages.

The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 11 denotes a high-temperature sodium container, and a plurality of support bolts 12 are erected on the outer peripheral surface of the container at intervals. As shown in FIGS. 5 and 6, the bolt 12 includes stoppers 12a, which are mounted at different positions, for mounting a heater and a support plate, which will be described later.
12b is provided.

Reference numeral 13 denotes heaters disposed at appropriate intervals in the vertical direction along the outer circumferential surface of the container 11;
2 and is easily fixed onto the support bolt 12 by being secured to the stopper 12a with the wire 14.

Further, support plates 15 disposed at intervals along the outer circumferential surface of the container 1 are mounted on the support bolts 12 so that the vertical bent pieces 15a at the ends thereof are supported by the stoppers 12b. The support plate 15 is easily fixed onto the support bolt 12 by hitting the support plate 15 onto the support bolt 12 at several locations with wires 14'. Furthermore, a wire contact type sodium leak detector 16 is supported on the support plate 15 for early detection of leaked sodium.

Furthermore, a heat insulating material 17 divided into several layers in the thickness direction is layered on the outer peripheral surface of the container 11, and is supported together with an exterior plate 18 through support bolts 12, and is fastened with nuts and washers 19. As a result, it is supported and fixed to the container 11.

According to the illustrated embodiment, as described above, the container 1
Support bolts 12 erected on the outer circumferential surface of 1 are used for attaching a heat insulating material 17 as well as a heater 13 and a support plate 15, and the support plate 15 serves as a receiving tray for a sodium leak detector 16. Heat insulation material 17
It serves both as a weight support and a convection prevention plate. Therefore, in the conventional structure, various hardware such as heater mounting brackets, insulation material support mounting brackets, and convection prevention plates were installed separately for each function. However, according to the illustrated embodiment, the mounting structure is extremely simple, and the number of attached metal parts can be significantly reduced.

Furthermore, the wire-type contact type sodium leak detector 16 has conventionally been a detector limited to large-volume leaks, but since it is attached to the support plate 15 disposed along the outer circumferential surface of the container 1, By appropriately arranging the support plate 15, it is possible to cover the entire outer circumferential surface of the container 1 with relatively fine pitches, so even at the stage of a minute leak of sodium inside the container, it is possible to Early detection becomes possible.

Furthermore, when using package-type heat insulators as in the past, it was necessary to install a stay sheet as an interior panel to prevent heat radiation loss.
According to this embodiment, the installation thereof is not necessary, and in addition to simplifying the mounting hardware, it is possible to reduce the cost of the heat insulation equipment and furthermore, the cost of the air conditioning equipment due to the reduction in the amount of heat dissipated.

[Brief explanation of drawings]

Fig. 1 is a partial slope view showing the outer circumferential surface of a conventional high-temperature sodium container, Fig. 2 is a partial longitudinal sectional side view thereof, and Fig. 3 is a slope view showing a part of the package-type heat insulating material cut away. , FIG. 4 is a partially cutaway perspective view of an embodiment of the high-temperature sodium container according to the present invention, and FIGS. 5 and 6 are partial vertical sectional views thereof, respectively. 11... Container, 12... Support bolt, 13...
Heater, 15... Support plate, 16... Sodium leak detector, 17... Heat insulating material.

Claims (1)

[Scope of utility model claims] A plurality of support bolts, which are erected at intervals on the outer circumferential surface of the container, are fixed through the heat insulating material layered on the outer circumferential surface of the container, and a heater is laid along the outer circumferential surface of the container, and the outer circumferential surface of the same container. A container for high-temperature sodium, characterized in that the supporting bolts support support plates that are disposed at intervals along the container and have an in-container sodium leak detector attached thereto.